updated 11:50 am EDT, Mon September 26, 2011

Nielsen says Android chewing non-iPhones in August

Android is still growing in the US, but is taking all its share from non-iPhone rivals, Nielsen found on Monday. Google was up from 40 percent in July to 43 percent in August, but Apple was still at the 28 percent it has held since June. Most of that decline came from Microsoft, which took the "other" category down from 13 percent to 11 percent.

RIM's BlackBerry also lost a point to 18 percent. It may have been helped by a slew of BlackBerry 7 phones shipping the same month, such as the Bold 9900 and 9930.

Google still had added momentum in the Nielsen research. Among those who had bought a smartphone in the past three months, 56 percent were buying Android. Apple still wasn't under threat with a static 28 percent, but there had been extra pressure on Microsoft and RIM, which collapsed to about six and nine points. Both audiences may have been in holding patterns for most of the summer as they either waited for later BlackBerry 7 launches or for Windows Phone 7.5 (Mango) in October.

Android may see a rare share reversal in October. The year so far has been unusual as Apple's first where a new iPhone didn't ship in the summer. Possibilities exist that iPhone share could start growing again as Apple fills pent-up demand, most of all if a Sprint iPhone 5 ships and eliminates another shelter for Android.

Smartphones should also still be on track to become the dominant cellphones in the US, researchers said. They were now up to 43 percent of total ownership and at 58 percent among those who had bought in the past three months. Ownership is expected to cross the 50 percent mark before the end of the year as the iPhone 5, and more Android devices like the Galaxy S II tip the balance.